G. van Roon, Protestants Nederland en Duitsland 1933-1941. BMGN - Low Countries Historical Review, [S. l.], v. 91, n. 1, p. 130–131, 1976. DOI: 10.18352/bmgn-lchr.1931. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102093.. Acesso em: 12 oct. 2024.